Jacob k



(No Model.)

- J. K. DIMMIGK.

FLASK FOR CASTING- No. 253,854. Patented Feb. 21.1882.

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N. PETERS. HHHHH -Li llll l lllllllll m im. D. c.

UNITED STATES PATENT OFFICE.

JACOB K. DIMMICK, OF NEWPORT, KENTUCKY, ASSIGNOR TO THE CINCIN- NATI AND NEWPORT IRON AND PIPE COMPANY, OF SAME PLACE.

FLASK FOR CASTINGJQ SPECIFICATION formingpart of Letters Patent No. 253,854, dated February 21, 1882.

Application filed May 24, 1881. (No model.)

To all whom it may concern Be it known that I, JACOB K. DIMMIcK, of

' Newport, in the county of Campbell and State ing pipesand other cylindrical bodies; and it consists in providing the same with detachable sections, which may be inserted toincrease the diameter or length of the flask, or removed when a smaller diameter or shorter length is desired.

The invention further consists in dividing the flask longitudinally into four sections instead of two, as heretofore, in order to permit the convenient insertion of the enlarging sections; in forming each section with an inner curvature, constituting an arc of a circle having a radius intermediate between that of the largest and of the smallest flask of which it is to form a part, whereby the minimum of deviation from a true circle is secured; and in an improvement in flask-hinges adapted for use in connection with the aforesaid improvements.

Hitherto it has been customary to construct flasks of this nature in two parts, in some cases hinged together at one side and clamped at the other, and in others merely bolted or clamped together at both sides. It has also been the practice to employ a different set of flasks for each size of pipe, thus necessitating a great number of flasks and requiring a large amount of capital to be kept idle therein.

The object of my invention is to adapt one set of flasks to the casting of varying sizes of pipe, thereby rendering unnecessary the large outlay attending the keeping of an assortment of flasks specially designed for eachparticular size, and permittingthe flasks of one size to be readily converted to another size when for any reason a large number of flasks of a particular size is required; and to this end I provide independent longitudinal sections which may be inserted or removed, as required, to increase or diminish the diameter.

In the accompanying drawings, Figure 1 represents a perspective view of my improved flask with the detachable sections removed; Fig. 2, a cross-section of the same; Fig. 3, a similar cross-section with the detachable portions in place; Fig. 4, a diagram illustrating the curvature of the sections; Fig. 5, views showing the inner and outer faces of one of the removable sections Fig. 6, similar views of oneof the main sections; Fig. 7, a side elevation of two of the sections bolted together, showing particularly the hinge which I prefer to use in said flask. Fig. 8 gives details of the hinge-joint, and Fig. 9 representsa modification of said joint.

A represents the flask as a whole, which under ordinary circumstances consists of the four longitudinal main sections a aa or, (shown in Figs. 1 and 2,) bolted together at opposite sides, forming two halves, and hinged at one of the intermediate dividing-lines and clamped at the other, or clampedat both, as preferred.

In this condition the flask will be used in the .same manner as those of ordinary construction for the size of pipe for which it is adapted; but in case it be desired to employ it for pipe of larger diameter, the main sections a of both halves will be unbolted'and separated, and an independent section, b,introduced betweenthe 7 sections of each half, the size or width of the intermediate section depending upon the desiredincrease of diameter. Ordinarily the enlarging sections will be. placed in two joints only; but each joint is shown so provided in Fig. 3 to illustrate the arrangement of the hinge and opposing joint under such plan.

It will be seen that if the interior of the flask be a true circle when the four sections only are used, the introduction of the addi- 8 tional sections will destroy the circle, or that it a true circle, when containing the extra sections, the removal of the latter will destroy the circle.

As there is in practice a considerable body 0 of sand or loam within the flask, between its walls and the space which receives the molten metal, a slight or moderate variation in the curvature of the flask is of no importance; but in order to equalize the variation and cause it 5 to be divided between enlarging and reducing the diameter, the curvature of the inner face of the sections is struck on a circle intermediate between that of the largest and smallest interior diameter of the flasks to be 10a formed, while its chord is restricted to a length corresponding substantially with the length ofa chord of the smaller flask. This will be more readily understood by referring to Fig. 4, in which the dotted lines represent respectively the circles of the largest and smallest interior diameters of the flask in its enlarged and reduced forms, while the full line indicates the circle on which the curvature is to be formed. It will be seen that it four of these sections be placed together, the enlargement of the circle will be greatest diametrically through the joints in both directions, as in Fig. 2, while if the extra sections be used the enlargement of the circle will be greatest on lines passing diametrically through the flask at points midway between the joints, as in Fig. 3. Under this construction it will be seen the body of sand orloam at the difl'erent points in the circle will vary but little in going from the smaller to the larger diameter, or vice versa, and a far greater range of variation is permitted than would be possible were the sections concentric with the circle of either the larger or smaller flask. The bolt-holes may be castin the flanges of the several sections.

The flask being made with four main sections instead of two, as heretofore, each section is of course smaller and contains a shorter curved surface, hence may be cast with greater facility and with far less liability of twisting or shrinking out of shape.

The sections a are preferably madein short lengths flanged at each end and adapted to be bolted together by the flanges to produceflasks of any desired length.

It is obvious that the numberofsections may be varied, either increased or diminished, though the number shown and described is deemed best. If three sections are employed normally, it will be advisable to hinge or otherwise connect them in such manner that they may readily open or separate at two joints instead ot one The sections may all be cast from a single pattern, and when so cast, being counterparts one of another, may be used for any part of any flask.

It is especially desirable, where the flask varies slightly from a perfect circle, that, in opening and shutting, the halves swing upon a fixed curve. The ordinaryhinge used for flasks, consisting of a horizontal bolt corresponding to 0 in the drawings, allows considerable play orlateral slip to the two halves of the flask, requiring also great care and strength ofmaterial in claspin g them together. To obviate these objections I pass through the hinge vertically, in the line of the pivotal axis upon which the halves swing, an additional bolt, spindle, or support, which centers the sections, prevents the objectionable play, causes the two halves to swing together with precision, and enables them to be secured together without any appreciable expenditure of strength orlabor. It is not necessary that this vertical or supplemental bolt be as extended as shown. It may be shortened or rounded off into aball, projectingbut slightly beyond the upper and lower face of the horizontal bolt 0, as at d in the modification. In either case it will be sunk into suitable recesses in the opposing sections, along their pivotal line, as shown.

I claim as my invention- 1. Aflask or mold-box for use in casting,

consisting of two or more longitudinal main sections and one or more intermediate removable sections, substantially as described.

2. A flask for casting, adapted to be separated to open for discharging the casting, and to be separated at points other than at saidopenin g lines to receive an enlarging section.

3. A flask for casting, composed of two or more sections, each having a curvature forming an arc of a circle of a diameter greaterthan the smallest diameter of the flask, whereby it is adapted to receive enlarging sections.

4. In a flask provided with removable sections, a series of longitudinal sections having a curvature differing from the true circumference of the flask, substantially as described, whereby the minimum deviation from a true circle is secured under variations in the number of sections employed.

5. A flask for casting, composed of detachable longitudinal and transverse main sections and supplementary longitudinal enlarging sections, whereby both its diameter and its length may be varied at will.

6. In combination with the swinging sections of a flask for molds, one or more centeringspindles affording support in the piyotal axis upon which they swing.

7. In combination with a flask for molds, a hinge composed of vertical andhorizontal bolts, substantially as described.

JACOB K. DIMMIOK.

Witnesses:

JOHN ()ELERING, DANL. KELLY. 

